The Mountain Hardwear Micro Power Stretch Long Sleeve Crew for Boys provides exceptional moisture management, warmth and durable stretch. This shirts smooth outer weave slides easily under layers and its brushed interior feels soft against the skin. Wear as a midweight baselayer, or alone on cool days.

Boys's Micro Power Stretch Zip T from Mountain Hardwear provides exceptional moisture management, warmth and durable stretch. Its smooth outer weave slides easily under layers and its brushed interior feels soft against the skin. Wear as a midweight baselayer, or alone on cool days.

Silky-soft Capilene 1 is the lightest of all our technical baselayers. A master at managing moisture to keep you cool during active use in warm to sweltering conditions, it also helps Safe guard from the sun and acts as an excellent quick-wicking baselayer beneath heftier Capilene or wool insulation when...

Silky-soft Capilene 1 is the lightest of all our technical baselayers. A master at managing moisture to keep you cool during active use in warm to sweltering conditions, it also helps Safe guard from the sun and acts as an excellent quick-wicking baselayer beneath heftier Capilene or wool insulation when...

A versatile Must have in any outdoor Closet, Patagonia's Capilene 2 Crew features open, highly breathable Capilene 2 knit fabric. The lightweight material allows for unhindered airflow and excellent wicking for endurance activities in warm to moderate temperatures. If you're comparing Capilene numbers, Capilene 2 is the fastest-drying Capilene baselayer...

A versatile Must have in any outdoor Closet, the Patagonia Capilene 2 Lightweight Crew for Girl features open, highly breathable Capilene 2 knit fabric. The lightweight material allows for unhindered airflow and excellent wicking for endurance activities in warm to moderate temperatures. If you're comparing Capilene numbers, Capilene 2 is...

During long runs or active days under the sun, the Boys's Capilene 2 Lightweight T-Shirt from Patagonia offers cool breeze comfort. This shirt is fashioned in Capilene 2 that features an open knit that encourages airflow to keep you cool and provides excellent wicking and exceptional breathability to keep you...

The sweaty work of breaking Path on a powder day sets you up for a big chill once you stop. The Boys's Capilene 2 Lightweight Zip-Neck, Patagonia's fastest-drying performance baselayer, keeps you dry during endurance activities and insulates when skies turn dark. Its open knit invites airflow and provides excellent...

Our lightest-weight relaxed-fit base layer quarter zip top regulates your temperature with maximum moisture transport and minimum bulk. Ideal for when temperatures or exertion levels are higher.

Built with Under Armour's Lightweight ColdGear, the Under Armour UA Base 1.0 Crew for Boys is ideal for training when the temperatures are under 55F and the exertion levels are high. Moisture wicking and quick to dry, the Base 1.0 Crew has flat lock seams for all-day chafe-free comfort and...